Institute of Botany
of the Czech Academy of Sciences
Institute of Botany of the Czech Academy of Sciences
Phylogeny of subtribe Hieraciinae (Asteraceae) - a model example of contrasting evolutionary strategies in closely related lineages
||Phylogeny of subtribe Hieraciinae (Asteraceae) - a model example of contrasting evolutionary strategies in closely related lineages
Chrtek Jindřich (researcher)
||Evolutionary patterns in related lineages with contrasting ploidy and reproduction mode are crucial topics of contemporary biology. Our model system, subtribe Hieraciinae (Asteraceae), combines features that are unique in plants: two different kinds of apomixis and the presence of a sexual sister genus. A multigene phylogeny based on complete or (in apomictic groups) representative sampling will serve as a backbone for interpretations on 1) historical biogeography: localization of evolutionary and diversity centres of the subtribe (connections of Iberian and North African floras, Macaronesian colonization, migration routes between Eurasia and North America); 2) genome size: diversification and evolution, responsible mechanisms at the genome level (diversity and quantity of transposable elements), relation to ecogeographical and biological factors, adaptive role; 3) karyotype evolution: localization of transposable elements, especially in connection with the Avoidance of Meiosis Locus (LOA), and their potential influence on reproductive isolation and the origin of apomixis.
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